Electric battery.



PATENTED AU'G.-7, 1906. I. KITSEE. ELECTRIC- BATTERY. APPLICATION FILEDJUNE 12, 1901. RENEWED'MAY 3, 1905.

INVENTOR WITNESSES i UNITED STATES -A.TE N'r Enron.

Specification of Letters Patent.

ELECTRIC BATTERY. f

Patented Aug. '7, 1906.

Application liled June 12, 1901. Renewed hlay 3, 1905, Serial No.258,692.

To all whom it may concern.-

Be it'known'that I, Isroon Krrsnn, of the l I city andzcouirty of:Philadelphia, State of- Pennsylvania, have invented certain new anduseful Improvements in Electric Batteries, (Case No. 128,) of which thefollowing is as'fiecification. y invention relates to an improvementelectrodes for electric cells. V 1a The object of my invention istoproduce an electrode for electric cells-primary as 'Well assecondaryadapted to produce the necessary depolarization without anydepolarizing material being resent in the liquid or without any highoxicl being present in the electrode itself.

Y The chefnicalaction dueto the dissolving of {the positive electrode inprimary cells or to the change from the metallic state to thg'afjstateof a salt compound of the active material in secondary cells is wellunderstood, and itsufiices to say that the hydrogen.

liberated through the dissolving. of the electrode or the change fromthe metallic state site sign. Inprimary cells depolarizingmaterial-material. capable of giving out oxygenis therefore employed inconjunction with the electrplyte to counteract or neutralize theliberated hydrogen, and in secondar batteries the electrode is providedwith a hig oxid capable of combining with the hydrogen as the samestrikes the surliberated as soon face of said electrode.

' It is the ann of my inventionto dispense withiz-the depolariz'material'usually emplo ed in nmaryce ls, as'well as with the 'g .oxiized material knownlas the active material in secondary cells.

The action of platinum in bringing about the condensation of gasesthrough contact action on its surface was taken advantage of the earlierdays of electrical science; but 215 on account of what seemed to beunsurmountable difficulties the practical application was' abandoned. Y1" sln another application, filed May;23,-'-1901, under Serial No.61,646, I have described an electrode consisting of carbon, theinterstices of which are lined with finely-divided platinum', and'thismy invention has more special reference to electrodes rovided Withactivemateri al, consistin of c arcoal or other porone carbon, provi edas to its inner spaces I divided-platinum, this active material tbthesalt compound of the active material carbon or blocks of what is Itends to polarize the electrode of the oppoplaced in holes orperforations of the electrode pro er or placed into spaces of acondoctor a apted to be used as an electrode proper. v,

Referring to the drawings, Figure 1 is an elevation of an electrodeembodying my invention. Fig. 2 is a sectional view of same. Fig. 3 is asectional view of an electrode con.- sisting of two independent latesconnected together so as'to form one e ectrode. Fig. 4 is an elevationembodying myinvention in modified form.

A is the electrode or conductor proper. Bis the active material. In Fig.3, C is the connecting-rod to clamp together two conducting-plates, andin Fig. 4 C is the'nonconducting su port for the electrode, and Drepresents t e holders .or-

bands keeping the whole electrode together.

If the electrode is in the shape as illustrated in Fig. 1, the samemayconsist of carbon or of any other suitable conductor provided with holesor perforations. perforations are placed blocks of very orous practice.ly the same-charcoal. The latter 18 Preferred. for the reason that it isvery porous and it is capable of containing in its pores a great amountof platinum-black.

The process, as described in the application above referred to, can bealsocarried out to advantage in preparing the carbon plugs.

In Fig. 4 the active material consists of blocks or briquets of carbonor charcoal provided with finely-divided platinum. These blocks orbriquets are separated from each other by and are in contact with aconduct ingstrip.. This strip'may consist of platinum or it may conslst'of any other conductor not injuriously affected by the electrolyte.If'the electrode is used in a secondary cell with diluted sulfuric acidas electrolyte, the conductin -strip may consist of lead, and if theelectrode is used in a secondary cell where the electrolyte consists ofcaustic alkali then thestrip may consist of copper or 7 other suitablemetal. The non-conductin fra me consists preferably, of hard rubber, an

the holders may referably be in the shape of soft-rubber ban s. l

I have illustrated and described the active material as being contained.in recesses of the conductor; butthe conductor may consist of a solidplate, and the active material may consist of a block of carbon rovidedas to its inner spaces with finely-dlvided platinum.

IIO

material placed in said spaces or recesses,

.Which said electrode is provided, said blocks The cat advantage of suchan electrode over the e ectrode asdescribed in the specification abovereferred to 'lies 'therein't'ha't the small plugs or blocks may beremoved at will, renovated, or repaired if out of order withoutdestroying or taking out o'f the liquid for a great length of time thewhole electrode. The plu s or blocks of active material can be Ina e insuch shape as'to be interchangeable, and one may easily be removed ifinjured and replaced by'another.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. An electrode for electric cells, consisting of the conductor proper,said conductor provided with holes or spaces, and an active materialcontained in said holes or spaces, said active material consisting ofplatinized 5 carbon 2. An electrode for electric of a conducting vide aseries 0 cells consisting material shapedso as to prospaces or recessesand activesaid active material consisting of porous carbon, the innerpores of which are lined with platinum in its finely-divided state.

3. in an electrode for electric cells, active 2 materiaiconsistin of aseries of independent blocks or plugs paced in the recesses with 'orplugs consisting of a carbonaceous material provided with platinum inits finely divided state.

4. An electrode f or electric cells consisting of a conducting-stripbent so. as to provide a "bio of -7. An'electrode-for electric cellsconsisting serieslof spaces, independent blocks of depolarizing materialplaced said spaces, said ,mde'endent blocks consisting of a porous withplatinum conducting material provided with platinum in itsfinely-divided state.

' 6. An electrode tor electric cells consisting of the conductor properformed so as to providea series of spaces, independent blocks placed insaid spaces, said inde endent F locks consisting of rovid with a secondmaterial, said seco material capadepo-lari-zing through catalyticaction.

of the following elements: a conductor shaped so as to provide a seriesof spaces or recesses, active material placed in said spaces orrecesses, said active material consisting of two substances, one aporous conductor adapted to serveas'carrier for the second substance,said second substance capable of depolarizing through catalytic action.

In testimony whereoi I hereby sign my name, this31st day of May, 1901,in the presence of two subscribing Witnesses.

, ISIDOR KIT SEE.

Witnesses:

E. R. STILLEY, W. B. ELnRnJeE.

